From b21162cf8e06f40baa1f58be6a8c17435cebc34d Mon Sep 17 00:00:00 2001 From: weidai Date: Fri, 4 Oct 2002 17:31:41 +0000 Subject: Initial revision git-svn-id: svn://svn.code.sf.net/p/cryptopp/code/trunk/c5@2 57ff6487-cd31-0410-9ec3-f628ee90f5f0 --- randpool.h | 46 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 randpool.h (limited to 'randpool.h') diff --git a/randpool.h b/randpool.h new file mode 100644 index 0000000..6bbe32f --- /dev/null +++ b/randpool.h @@ -0,0 +1,46 @@ +#ifndef CRYPTOPP_RANDPOOL_H +#define CRYPTOPP_RANDPOOL_H + +#include "cryptlib.h" +#include "filters.h" + +NAMESPACE_BEGIN(CryptoPP) + +//! Randomness Pool +/*! This class can be used to generate + pseudorandom bytes after seeding the pool with + the Put() methods */ +class RandomPool : public RandomNumberGenerator, + public Bufferless +{ +public: + //! poolSize must be greater than 16 + RandomPool(unsigned int poolSize=384); + + unsigned int Put2(const byte *begin, unsigned int, int messageEnd, bool blocking); + + bool AnyRetrievable() const {return true;} + unsigned long MaxRetrievable() const {return ULONG_MAX;} + + unsigned int TransferTo2(BufferedTransformation &target, unsigned long &transferBytes, const std::string &channel=NULL_CHANNEL, bool blocking=true); + unsigned int CopyRangeTo2(BufferedTransformation &target, unsigned long &begin, unsigned long end=ULONG_MAX, const std::string &channel=NULL_CHANNEL, bool blocking=true) const + { + throw NotImplemented("RandomPool: CopyRangeTo2() is not supported by this store"); + } + + byte GenerateByte(); + void GenerateBlock(byte *output, unsigned int size); + + void IsolatedInitialize(const NameValuePairs ¶meters) {} + +protected: + void Stir(); + +private: + SecByteBlock pool, key; + unsigned int addPos, getPos; +}; + +NAMESPACE_END + +#endif -- cgit v1.2.1